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  • Goransson, GunnelSwedish Geotech Inst, Linköping, Sweden. (author)

Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-09-08
  • Frontiers Media S.A.2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-456823
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-456823URI
  • https://doi.org/10.3389/fmars.2021.729243DOI
  • https://res.slu.se/id/publ/113764URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Unregulated discharges of wastewater from pulp and paper factories resulted in the formation of relatively thick organic (cellulose) rich sediments in shallow waters along the Swedish coast. These deposits are known as fiberbanks and are contaminated by persistent organic pollutants (POPs), metals and methylmercury, which can be dispersed by diffusion and advective processes coupled to propeller wash, high river discharges, strong wind waves and submarine landslides. Based on a case study of polychlorinated biphenyls (PCBs), one group of prevalent POPs in the fiberbanks, we present a probabilistic approach to estimate the potential risk of dispersion of fiberbank contaminants. The approach allows for estimation of the dispersal pathways that dominates the risk within a given time and provides more insight about the significance of various dispersion processes. We show that it is highly likely that chemical diffusion and advection triggered by ship-induced resuspension will disperse PCBs (sum of seven congeners; sigma 7PCB) above a threshold level for environmental impact, while the likelihood of river and wind-wave generated resuspension dispersion pathways are lower (similar to 20%, respectively). We further show that there is approximately 5% likelihood that a submarine landslide will disperse sigma 7PCB above the threshold level. The study implies that the governing parameters for risk assessment specifically should include reliable data on contaminant concentration, water depth above the fiberbank, estimation of concerned fiberbank areas, time duration of erosive fluid flows and measured diffusion. The approach provides insight into the importance of various dispersion processes. We suggest that it can be applied to support risk assessment, especially when there are limited available data and/or knowledge about the system under study.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Apler, AnnaGeol Survey Sweden, Uppsala, Sweden. (author)
  • Dahlberg, Anna-KarinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden. (author)
  • Lofroth, HjordisSwedish Geotech Inst, Linköping, Sweden. (author)
  • Josefsson, SarahGeol Survey Sweden, Uppsala, Sweden. (author)
  • Wiberg, KarinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden.(Swepub:slu)48881 (author)
  • Frogner-Kockum, PaulSwedish Geotech Inst, Linköping, Sweden. (author)
  • Nylander, PerSwedish Geotech Inst, Linköping, Sweden. (author)
  • Hedfors, JimSwedish Geotech Inst, Linköping, Sweden. (author)
  • Snowball, Ian,1963-Uppsala universitet,Naturresurser och hållbar utveckling(Swepub:uu)iansn468 (author)
  • Swedish Geotech Inst, Linköping, Sweden.Geol Survey Sweden, Uppsala, Sweden. (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Frontiers in Marine Science: Frontiers Media S.A.82296-7745

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